Refrigerator.



Patented Feb. 16, 1915.

2 SHEETS-SHEET 1.

O O 0 0 O 00 00 00000 O Q H. H. PIPER.

REFRIGERATOR.

APPLICATION FILED MAR.31, 1914.

00 000000 00000 00 O0 O0 00 00 00 00 000000 00000 00000 00000 0 D 00000 000 00000 0 0000000 000 90 0000000000000 0 0 00 0O 0D 0000 O mf hpbpl u wbhmkb b vbppobbb no 00000000 000 000 ;30000000 o wmqb mbdooo 000000000000 000000000000 0000000000 0 000000000000 00 000000000 0000000 00000 000000000000 0 0000000000 000000000000 000000000000 0000000000 on 000000000000 0 000000 00000 00 000000000 0000000 00000 0000000 006 00 000000000000 O O O O O O o O H. H. PIPER.

REFRIGERATOR.

APPLICATION FILED MAILSI, 1914.

1,128,508., Paten ted Feb.-16,1915.

2 SHEETS-SHEET 2.

O O 0 O 0000000 o ooooo 0000000 o0oOo0c 0000000 UNETED earns rare:

' @FFTQE.

HERBERT H. PIPER, OF JACKSON, MISSOURI, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO PIPER COOLING AND PRESERVING COMPANY, OF JACKSON, ,MISSOURI, A CORPORATION OF MISSOURI.

REFRIGERATOR.

Specification of Letters Patent.

Patented Feb. M5, 1915.

Application filed March 31, 1914. Serial No. 828,624.

1 To all whom it may concern:

Be it known that I, HERBERT H. PIPER, a

citizen of the United States, and resident of had to the accompanymg drawings, forming a part hereof.

My invention relates to an improved refrigerator, and consists in the novel construction hereinafter described and specifically designated in the appended claims.

The ob ect of my invention is to provide an improved refrigerator which will operate without the use of ice and both cool and preserve all kinds of food, fruits and so forth.

In the drawings: Figure 1 is a sectional front elevation of a cooling and preserving apparatus made use of in carrying out my invention; Fig. 2 is a sectional plan view of the same, the section being taken on the line 2-2 of Fig. 1; Fig. 3 is an end elevation of the same, the section being taken on the line 3-3 of Fig. 1; and Fig. 4 is an enlarged sectional front elevation taken on the line 4-4 of Fig. 2.

In the practical construction of my invention I provide an outer protecting casing 5 which may be constructed of wood, or any other suitable material of which the outer casings of ordinary refrigerators are now made, and within this casing is located a sheet metal lining 6 which is separated from the said outer casing by means of a suitable body of heat insulating material 7, such as mineral wool or asbestos, the purpose of such construction being to accomplish the Well known result heretofore performed by common refrigerator casings. Mounted within said sheet metal lining but separated therefrom by a considerable air space 8 s a sheet metal outer lining 9 of a chem1cal chamber 10, the inner wall 11 of said chemical chamber being provided wlth numerous small perforations 12, or is otherwise foraminous. The inner wall 11 of said chemical haimber incloses the storage chamber 13 in which the food or fruit is placed during the cooling and preserving process. Withm said storage chamber 13 and secured to the said perforated wall 11 are suitable shelf racks 14 which are secured in place in any suitable manner, in the present instance bolts 15 being passed through said racks, thence through said inner wall 11, thence through the chemical chamber 10, thence through the outer wall 9 of said chemical chamber, thence through said air space 8, thence through the sheet metal lining 6, insulation 7 to the inner surface of said outer casing 5, where they are secured to suitable sheet metal brackets 16, secured to the inner surface of said outer casing by means of suitable screws or other fastening devices. I

I make use of quite a number of the bolts 15, applied as above decribed, for the purpose principallyof supporting the chemical chamber and the storage chamber. Mountwith suitable funnels 21 and are also provided with an opening 22 through which said sponge may be inserted and withdrawn.

23 indicates a tube which extends across the chemical chamber near the bottom thereof and connects the interior of said water tanks with the air space 8.

24 indicates other tubes which are inserted through the outer casing 5 near the upper portion thereof and through said insulating material 7 and the sheet metal lining 6, to form air inlets connecting said air space with the outer air. An opening 25 is formed in the upper end of said outer casing, insulating material 7 and sheet metal lining 6 so that access may be had to the interior of said chemical chamber for the purpose of placin the preserving and cooling chemicals t erein. Said opening is normally closed by a suitable cover or door 26. The outer casing is provided with the usual overlapping doors 27 and 28 which are mounted upon hinges 29, one of said doors being provided with the usual handle 20. The said storage chamber 13 is also provided with doors 31 and 32 mounted upon hinges 33, the door 32 being provided with the usual handle 34.

The numeral 35 indicates a series of horizontal bracing bars extending beneath the upper wall of the storage chamber 13, for

. the storage chamber and of the outer casingstance by means of solder.

In operation the chemical chamber 10 is filled with a chemical mixture of the following ingredients:

Sodium chlorid 80% Potassium nitrate 15% Ammonium chlorid 5% The water tanks 18 are then supplied with a body of water reaching almost to the air pipes 23, and the sponge 20 is inserted in said tanks so that said sponge will absorb a quantity of the water and cause the same to evaporate. The fruit, meat or other articles to be preserved or cooled are next placed in the storage chamber 13 supported upon suitable shelves therein, and the said doors of are closed, whereupon a chemical reaction between said chemicals and the water takes place, and the interior of the said storage chamber is soon permeated by the chemically charged vapor, and evaporation of the mixture takes place sufliciently fast to greatly lower the temperature of the interior of the said storage chamber, and simultaneously preserve and cool the contents of said chamber without the use of ice or any other refrigerant. The air from the exterior of the outer casing is drawn in through the tubes 24 and thence is diffused in said air space 8, and finally enters the Water tanks 18 through the air tubes 23.

. tion, as the same may be changed by a .skilled workman without departing from The generation of the cooling and preserving vapor as described is continuous as long as the supply of chemicals lasts, and

when the same become exhausted the quantity may be renewed from time to time by removing said cover 26.

I do not limit myself to the exact apparatus herein shown in practising my inventhe scope of my invention.

Nor do I limit myself to the specific per centage of the ingredients above stated, as I have found that the percentage of each ingredient may be increased or diminished within reasonable limits without departingfrom the scope-of the invention.

I claim:

1. The improved refrigerator, comprising a suitable outer casing, a lining separated from said outer casing, a body of insulating material located in the space between said lining and said outer casing, a storage chamber having foraminous or perforated walls and located within the refrigerator with a chemical chamber surrounding it, a water tank in said storage chamber, and an air pipe extending from said water tank through the wall of said storage chamber, through said chemical chamber, through said lining, and having suitable connections leading to the external atmosphere. p

2. The improved refrigerator, comprising a suitable outer casing, a lining. separated from said outercasing, a body of insulating material located in the space between said lining and said outer casing, a storage chamber having foraminous or perforated walls and located within the refrigerator with a chemical chamber surrounding it, a water tank in said storage chamber, an air pipe extending from said water tank through the wall of said storage chamber, through said chemical chamber, through said lining, and an air-inlet extending through the outer casing to the external walls and located within the refrigerator with a chemical chamber surroundingv it, means for forming an air space around said chemical chamber, a water tank in said storage chamber, an air pipe extending from said water tank through the wall of said storage chamber, through saidchemical chamber, and through said lining, and airinlets extending through the outer casing to the external atmosphere and opening thereinto.

4. The improved refrigerator, comprising an insulated outer system. and an inner system located within said outer system and comprising a storage chamber having perforated walls separated from the walls of said outer system by means of a chemical chamber, and suitable means for separating the outer walls ofsaid chemical'chamber a distance from the said outer system.

In testimony whereof, I have signed my name to this specification, in presence of two and 

